Characteristics cannot delete

-- url of the page with the problem -- : www.shutterfashion.com.my/

Dear Support

I'm trying to delete one of the characteristics value , but it is not working to delete it after click "Save"? Why cannot delete it?
Thank you

Hi,

You could try with a different browser. Maybe there is some caching or something. Or maybe you have a security extension which blocks that for that value ?
I would also recommend updating to the latest version since I see that you're using the 2.6.3.